Hi again,
You made a mistake.
It is necessary to observe the syntax of all commands. That's why I wrote a command in code that can be copied from my message and pasted into the command window.
You missed the spaces (intervals) in the text of the command. Therefore, the program did not understand what you want from it. Correct the error and try again. Be careful with all the details and everything will turn out.

Hello thaayb,
Thank you for your tutorial. This method to edit the Main.cmd has been known and definitely should be used. However, it's best to create the compiled install file first.
Unfortunately, all install files of Chuwi are always hopelessly outdated. To use them, it's like to jump over a chasm in two leaps. Therefore, thank you. But I propose to go the optimal way. If the manufacturer does not want to release new Windows install files, then users have to do it themselves.